Measurement of the proton structure functionF2 from the 1993 HERA data

MIT Cambridge MA
Zeitschrift für Physik C 08/1995; 65(3):379-398. DOI: 10.1007/BF01556128

ABSTRACT The ZEUS detector has been used to measure the proton structure functionF
2. During 1993 HERA collided 26.7 GeV electrons on 820 GeV protons. The data sample corresponds to an integrated luminosity of 0.54 pb–1, representing a twenty fold increase in statistics compared to that of 1992. Results are presented for 7Q
24 GeV2 andx values as low as 310–4. The rapid rise inF
2 asx decreases observed previously is now studied in greater detail and persists forQ
2 values up to 500 GeV2.

3 Reads
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We have completed the next-to-leading order perturbative QCD corrections to the virtual-photon exclusive differential cross sections for heavy quark production in deep-inelastic electron-proton scattering, i.e. e + P a ̊ Q + Q + X. Using these results, we have computed distributions which are sensitive to correlations among the heavy quark, the heavy antiquark, and the associated jet. Some predictions for charm and bottom heavy quark production at the electron-proton collider HERA are presented.
    Nuclear Physics B 03/1995; 452(1-2-452):109-160. DOI:10.1016/0550-3213(95)00256-R · 3.93 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper we present the analytic form of the heavy quark coefficient functions for deep inelastic lepton-hadron scattering in the kinematical regime Q2 ⪢ m2. Here Q2 and m2 stand for the masses squared of the virtual photon and heavy quark, respectively. The calculations have been performed up to next-to-leading order in the strong coupling constant αs using operator product expansion techniques. Apart from a check on earlier calculations, which however are only accessible via large computer programs, the asymptotic forms of the coefficient functions are useful for charm production at HERA when the condition Q2 ⪢ mc2 is satisfied. Furthermore, the analytical expressions can also be used when one applies the variable flavour number scheme up to next-to-leading order in αs.
    Nuclear Physics B 07/1996; 472(3-472):611-658. DOI:10.1016/0550-3213(96)00228-3 · 3.93 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Cross sections for the interactions of ultrahigh-energy neutrinos with nucleons are evaluated in the light of new information about nucleon structure functions. For 102 eV neutrinos, the cross section is about 2.4 times previous estimates. We also review the cross sections for neutrino interactions with atomic electrons. Some consequences for interaction rates in the Earth and for event rates from generic astrophysical sources in large-scale detectors are noted
    Astroparticle Physics 08/1996; 5(2-5):81-110. DOI:10.1016/0927-6505(96)00008-4 · 3.58 Impact Factor
Show more